Motor



H. LUBE Nov. 22, 1927.

MOTOR Filed Oct 31,

1922 2 Sheets-$heet l K R M u W. V A R M m w H W l I i l ,W W

Nov. 22, 1927.

. 1,649,836 H. LUBE MOTOR Filed Oct. 31. 1922 2 Sheets-Shed 2 INVENTQR.fiE/YRY LUBE.

Patented Nov. 22, 1927.

UNITED STATES PATENT OFFICE.

HENRY LUBE, or COLLEGE rorN'r, NEW YORK, ASSIGNOR T RADIO Mo'rIONPICTURE PHON. cone, or LONG ISLAND CITY, NEW YORK, n CORPORATION orMASSACHU- SETTS.

MOTOR.

Application filed October 31, 1922.

It is an object of the present invention to provide a motor, and moreparticularly a motor which is adapted for use in connection with thedriving of apparatus such as phonographs, motion picture projectors,etc.

It is well appreciated that numerous attempts have been made tooperatively connect a motion picture projector and a talking machine,but these attempts for the most part have not met with success, incidentto the fact that great care must be utilized in synchronizing themovement of both of the devices, so that a proper ratio of operationwill exist between the two, insuring a cor- 1 rect light imageprojection, and a sound wave production in register with each other.

Thus it is a further object of this invention to provide a device of thecharacter stated which may be utilized in connection with thesimultaneous driving of both a talking machine and a motion pictureprojector in such a manner that these machines will operate insynchronism, the sound waves emanating from the first named machinebeing in absolute register with the light images projected by the lastnamed device.

Another object of this invention is that of furnishing a motor of anydesirable type which will act as a driving element, and

serve to operate a driven element, the latter being connected with aprojecting machine,

as well as the turntable of a talking machine in such a manner that bothof these elements will be driven at the proper speed necessary 35 totheir correct operation.

Still another object is that of constructing mechanism connecting thedriving and driven elements aforementioned, one with the other, so thatthe speed of the driven 4- member will at all times be constant, thuspreventing variations in the speed of the driven element which would bedetrimental to the result produced.

I wish it understood, however, that al- 4 though as aforestated thepresent invention is particularly intended and conceived with a view ofproperly synchronizing the movements of a talking machine of anydesirable type, with the movements of a motion picture projector, suchas has for example been shown in my co-pending application Serial Number589,520 on a motion plcture machine, which application was filed Sep-Serial No. 598,098.

tember 21, 1922, that mypresent invention is applicable to numerousother associations. I With these and other objects in mind, theinvention includes essentially a driving and a driven member, togetherwith means connecting these elements one with the other in such a mannerthat the speed of the driven shaft will be constant, so that in theevent that both a projecting machine and a talking machine are connectedto this latter element, both of these machines will operatesynchronously. 1

Reference is had to the attached sheets of drawings as illustrating onepractical embodiment of my invention, and it will be seen in thesedrawings that:

Fig. 1 is a perspective View of a talking machine of conventionalconstruction within which my improved mechanism is disposed, the latterserving to operate this machine, and being coupled with a motion pictureprojector of the type illustrated in my co-pending applicationafore-reierred to.

Fig. 2 is a side view of the mechanism involved in my invention andshowing the same as applied to the apparatus for which it isparticularly designed.

Fig. 3 is a transverse sectional View taken along the line 38 and in thedirection of the arrows indicated in Fig. 2.

Fig. 1 is a side view of a detail of construction, showing a part of theinvention,

and

Fig. 5 is a sectional plan view taken along the line 55 and in thedirection of the arrows indicated in Fig. 4.

Referring primarily to Fig. 1 it will be noted that the referencenumeral 10 indicates a projecting machine of the type noted in myprevious application, and I wish it understood that any desirable typeof projecting machine may be operated by means of the mechanism,hereinafter set forth, and that this driving is effected in any suitablemanner such as for example by connecting the driving shaft- 11 oftheprojecting machine with a shaft 12 by means of a universal 18, the shaft12 being in turn connected by means of a universal 14 with a drivingshaft 15 extending beyond the cabinet of the talking machine 16, orother housing utilized for enclosing the mechanism.

With regard to the H'IlQClltUllSlll serving to connect the shaft withthe turntable of the talking machine, it will be noted, reference beinghad to Fig. 2 that this shaft preferably mounts a worm 17 which mesheswith the teeth of a worm wheel 18 secured to a turntable spindle 19,which latter in the usual manner is mounted in suitable bearings, andextends beyond the deck of the talking machine, and carries theturntable Thus a. suming that the shaft 15 is rotated in a mannerhereinafter described, by a suitable motor 22 itwill be appreciated.that incident to the universals 1 3; and 13, and the shaft 12 that thedriving shaft 11 of the projector 10 will be rotated to operate themechanism of the latter. Also the worm 18 carried by the driving shaft15 will rotate the spindle 19, and thus the turutable 21 will beproperly moved.

Also with a view of insuring a proper driving ratio betweenthe mechanismof the projector 11 and the turntable, it will be noted, assuming forexample that the shaft of the projector is to be rotated at a twelve toone ratio with respect to the turntable spindle, and assuming that theworm 17 and gear 18 areof a twelve to one ratio, that for eachrevolution of the driving shaft 15 one twelfth of a revolution of thespindle 19 will result so that the projection of the light images, andthe sound waves will be obviously synchronized, it being understood thatif a different ratio exists between the revolutions of the turntable andthe driving shaft of the projecting machine, that these parts may againbe caused to operate in synchronism one with the other by simplyaltering the ratio of the elements 17 and 18.

Now with a view of properly connecting the motor 22 with the drivingshaft 15 in such a manner that the variations in the speed of the formerwill not be transmitted to the latter, but that this last named elementwill rotate at a constant R. P. M., it will be noted that I affix to theshaft 15 a belt pulley 23 and a similar pulley 26 of a smaller size isaflixed to the driving shaft of the motor, these pulleys being connectedtogether by means of a belt- 25. An idler roller 26 normally bearsagainst the belt -5 in such a manner as to'tension the same in order toinsure a direct and positive drive. This roller carried by an arm 27which may form one part of a. bell crank. it being noted that its bodysupported adjacent its upper end in such a manner that it is capable ofbeing rocked, this support being conveniently effected by means of apivot pin 28. A spring 29 has one of its ends attached to a fixedport-ion of the driving mechanism assembl, and its opposite end isconnected with the arm 27 so that the roller 26 is normally caused tobear against the belt 2'53, and thus to tension the same as has beenindicated in full lines in Fig. 3. The inner face of the arm 97 may begrooved as has been indicated at 30, and bearing against this groove isthe outer face of a conical collar 31, the latter being mounted forsliding movement upon the shaft 15, and being attached to the movableend of a centrifugal governor 32, the opposite end of which is fixedlyattached to the shaft 15. Thus during normal operation of the mechanismthe shaft 15 will rotate in direct proportion to the rotation of themotor shaft. However, assuming that this latter shaft exceeds apredetermined speed the governor 32 will act to draw the collar 31towards the arm 27, which will result, incident to the engagement of thecollar with the groove 30, in the arm being moved outwardly to a greateror less extent in proportion to the R speed of the motor shaft. Thiswill cause the roller 26 to move outwardly to slacker! the tension uponthe belt 25, and if the speed of the motor 22 is greatly in excess ofits required speed the arm 2'? will finally swing to the position shownin dotted lines in Fig. 23 at which point the slacl' iess of the beltwill be such as to permit a material amount of slippag between thedriving and driven elements, so that by this expedient a substan tiallyconstant speed of the driving shaft 15 is assured, irrespective of therevolutions on the part of the motor 22.

Finally to provide means serving to dis engage the driving and drivenelements. and to cause the latter to be brought to a stop. it will beseen that the bell crank of which the arm 27 forms one part, is providedwith another arm which extends beyond the pin 28, this arm being formedwith a a inclined lower surface 33 against which a pin 34 may bear, thelatter being in turn. cured. to a shaft 35 to which there is con necteda handle 36. Thus upon this handle being operated, the pin 34 will bearagainst the underside of the arm 32 and move the same to rock the arm 27to the position shown in dotted lines in Fig. 3 and the driving elementsare brought to an immediate stop upon this occurring, by means of abrake shoe or strip 37 which may be attached to the bell crank and bearagainst the upper face of the pulley 23 to bring the same to a stop.

Tans it will be appreciated lhat the objec s of this invention have beenaccompl" shed in that assuming that the motor 22 is making 400 R. P. M.the ratio of the pulleys 24 and 23 is such with respect to each otherthat the shaft 15 will be driven at approximately 700 R. P. M. whichspeed is a proper one for correct operation of the driving shaft 11 ofthe projecting machine. Also due to the reduction mechanism afforded bythe worm and worm wheel the spindle will be turned at a speed consistentwith the production of proper results on the part or the talkingmachine, and thus the movement of both mechanisms will be synchronizedand co-ordinated one with the other.

Further, in the event that the speed of the motor should fluctuate, itwill be seen primarily that the reduction offered by the mechanismafore-described will operate to diminish undesirable results due to thefact that these fluctuations will hardly be perceptible, but in theevent that the speed of the motor becomes excessive it will beunderstood that the governor will immediately act to permit a slippagein the connection existing between the motor shaft and the shaft 15 soas to maintain the proper ratio.

It will be understood that numerous modifications of structure anddifferent associations of parts might readily be resorted to without inthe least departing from the spirit ofmy invention as defined by myclaims; which are 1. In an apparatus of the character described, thecombination of a driving shaft, a motor, belt pulleys connected withsaid shaft and motor, a belt passing over said pulleys, an arm, a rollercarried by said arm normally bearing in intimate contact against saidbelt, and a centrifugal governor carried by said shaft forautomaticallymoving said arm and roller upon the speed of said shaftexceeding a predetermined number of revolutions per minute. a

2. In an apparatus oft-he character described, the combination of adriving shaft, a motor, belt pulleys connected with said shaft andmotor, a belt passing over said pulleys, an arm, a roller carried bysaid arm normally bearing in intimate contact against said belt, and agovernor mounted upon said shaft, a collar connected with said governor,said collar being adapt-ed to bear against said arm whereby to move saidroller to a point at which the same Will bear lightly against said belt.

3. In an apparatus of the character described, the combination of adriving shaft,

a motor, belt pulleys connected with said shaft and motor, a beltpassing over said pulleys, an arm, a roller carried by said arm normallybearing in intimate contact against said belt, a governor mounted uponsaid.

shaft, a collar connected with said governor, and slidably carried uponsaid shaft, said collar being adapted to bear against said arm wherebyto move said roller toa point at which the same will bear lightlyagainst said belt.

i. In an apparatus of the character described, the combination of adriving shaft, a motor, belt pulleys connected with said shaft andmotor, a belt passing over said pulleys, an arm, a roller arried by saidarm normally bearing in intimate contact against said belt, a governormounted upon said shaft, and a conical collar adapted to bear againstsaid arm whereby to move said roller to a point at which the same willbear lightly against said belt.

5. In an apparatus of the character described, the combination of adriving shaft, a motor, belt pulleys connected with said shaft andmotor, a belt passing over said pulleys, an arm, a roller carried bysaid arm normally bearing in intimate contact against said belt, agovernor mounted upon said shaft, a collar bearing against a grooveformed in said arm for moving said arm and roller to a point at whichthe latter will bear lightly against "said belt.

Signed at New iork, in the county of New York and State of New York,this 26th day of October A. D. 1922.

HENRY LUBE.

(3p in)

